Air Cooled Screw Chiller and Heat Pump, 280kW-1120kW

The air cooled screw chiller and heat pump is used for heating and cooling applications in large commercial structures such as malls, office buildings, workshops, hotels, and hospitals. The air cooling unit is especially preferred in locations in which water is scarce.

Download Technical Parameters R134a Air Cooled Screw Chiller and Heat Pump

Type			Screw Type
Model -RLSFC/RLSFCR			260	280	320	360	460	500	560
Nominal cooling capacity		kW	252	280	321	356	458	496	562
Cooling input power		kW	82	90	108	122	148	163	182
Running current		A	162	179	214	234	290	323	360
Nominal heating capacity		kW	246	280	328	368	465	503	583
Heating input power		kW	80	89	92	120	145	160	179
Running current		A	147	162	194	211	263	293	354
Max. running current		A	199	222	265	290	361	398	452
Cable diameter (copper wire distance ≤20 meters)		mm2	3*95 2*50	3*120 2*50	3*150 2*70	3*150 2*70	3*185 2*95	3*240 2*120	3*240 2*120
Compressor	Type		Semi-hermetic screw
	Quantity		1
	Energy steps		25%-50%-75%-100%
	Power voltage		3N-380V-50HZ
	Starting mode		Y-▲ or by winding
	Refrigerant	Type	R134a
		Charge (kg)	70	80	95	110	135	150	170
		Control	Electronic expansion valve (EXV)
Condenser type	Type		Internally threaded copper tube & hydrophilic aluminum fins
	Fan type	kPa	Axial type fan
	Qty		6	6	8	10	10	10	10
	Input power	kW	2.2*6	2.2*6	2.2*8	2.2*10	2.2*10	2.2*12	2.2*12
Evaporator	Type		Shell & tube type
	Water pressure drop	kPa	70
	Water pipe Dia. DN		100	100	100	125	125	125	150
	Water flow	m3/h	43	48	55	61	79	85	97
Heat recovery device	Type		Shell & tube type
	Qty		30%
	Water Pressure drop		70
	Water pipe Dia. DN		65	65	80	80	80	80	100
	Water flow	m3/h	17	19	22	25	31	34	38
Heat recovery device	Type		Shell & tube type
	Qty		100%
	Water pressure drop		70
	Water pipe Dia. DN		80	100	100	100	125	125	125
	Water flow	m3/h	34	38	44	49	63	68	77
Noise level		dB(A)	79	79	79	79	81	83	83
Dimension	L	mm	3190	3190	4100	5010	5010	6168	6168
	W	mm	2250	2250	2250	2250	2250	2250	2250
	H	mm	2480	2480	2480	2480	2480	2480	2480
Net weight		kg	2500	3000	3500	5800	6000	6200	6400
Operation weight		kg	3100	3500	4000	6200	6600	7000	7400
Main protection measures		1. High &low voltage protection; 2. Anti-freezing protection;
		3. Temperature control; 4. Owe anti-phase protection;
		5. High & low pressure protection; 6. High pressure exhaust temperature protection;
		7. Built-in motor overheating protection; 8. Over-current protection;
		9. Safety valve; 10.Check valve;
Remarks:		1. Cooling standard working conditions Ambient temperature: 35℃DB/24℃WB Cold water inlet temperature: 12℃ Outlet temperature: 7℃
		2. Heating standard working conditions Ambient temperature 7℃DB/6℃WB Cold water inlet temperature 40℃ Outlet temperature 45℃

R134a Air Cooled Screw Chiller and Heat Pump

Type			Screw Type
Model -RLSFC/RLSFCR			520	560	640	720	920	1000	1120
Nominal cooling capacity		kW	504	560	642	712	916	992	1124
Cooling input power		kW	163	181	215	245	295	325	364
Running current		A	324	358	428	467	579	646	720
Nominal Heating capacity		kW	492	560	656	736	930	1006	1166
Heating input power		kW	160	177	185	240	290	320	357
Running current		A	293	323	387	422	526	586	708
Max. running current		A	399	445	530	579	723	796	904
Cable diameter (copper wire distance ≤20 meters)		mm2	2*(3*95 2*50)	2*(3*120 2*50)	2*(3*150 2*70)	2*(3*150 2*70)	2*(3*185 2*95)	2*(3*240 2*120)	2*(3*240 2*120)
Compressor	Type		Semi-hermetic screw
	Quantity		2
	Energy steps		25%-50%-75%-100%
	Power voltage		3N-380V-50HZ
	Starting mode		Y-▲ or by winding
	Refrigerant	Type	R134a
		Charge (kg)	140	160	190	220	270	300	340
		Control	Electronic expansion valve (EXV)
Condenser type	Type		Internally threaded copper tube & hydrophilic aluminum fins
	Fan type	kPa	Axial type fan
	Qty		12	12	16	20	20	24	24
	Input power	kW	2.2*12	2.2*12	2.2*16	2.2*20	2.2*20	2.2*24	2.2*24
Evaporator	Type		Shell & tube type
	Water pressure drop	kPa	70
	Water pipe Dia.DN		125	150	150	150	150	150	200
	Water flow	m3/h	87	96	110	122	158	171	193
Heat recovery device	Type		Shell & tube type
	Qty		30%
	Water pressure drop		70
	Water pipe Dia. DN		80	80	100	100	100	125	125
	Water flow	m3/h	34	38	44	49	63	68	77
Heat recovery device	Type		Shell & tube type
	Qty		100%
	Water pressure drop		70
	Water pipe Dia. DN		100	100	100	100	125	125	125
	Water flow	m3/h	69	76	88	99	125	136	154
Noise level		dB(A)	79	79	81	83	83	84	84
Dimension	L	mm	6186	6186	8006	9826	9826	12372	12372
	W	mm	2250	2250	2250	2250	2250	2250	2250
	H	mm	2480	2480	2480	2480	2480	2480	2480
Net weight		kg	5400	6000	6600	11500	12500	13500	14500
Operation weight		kg	6000	6600	7200	12100	13100	14300	14400
Main protection measures		1. High & low voltage protection; 2. Anti-freezing protection;
		3. Temperature control; 4. Owe anti-phase protection;
		5. High & low pressure protection; 6. High pressure exhaust temperature protection;
		7. Built-in motor overheating protection; 8. Over-current protection;
		9. Safety valve; 10. Check valve;
Remarks:		1. Cooling standard working conditions Ambient temperature: 35℃DB/24℃WB Cold water inlet temperature: 12℃ Outlet temperature: 7℃
		2. Heating standard working conditions Ambient temperature: 7℃DB/6℃WB Cold water inlet temperature: 40℃ Outlet temperature: 45℃

Features

The chiller and pump features a modular design. Each module has the same dimensions except for length. By combining different modules, various cooling and heating demands can be met. Each module is connected through a sophisticated communication system that is controlled by a micro-computer for maximum efficiency.

Easy assembly All assemblies are finished in our factory. Prior to delivery, the products are strictly tested and adjusted. When assembling the equipment onsite, the machine can immediately be put into operation after connecting it to a power supply.

Space saving The machine set features a waterproof design. It can be directly installed on a building's roof, inside, or near the structure.

No need for installation of cooling tower The machine set adopts air cooling methods, which is convenient for management and maintenance. It is especially applicable for the places lack of water.

Cost saving It reduces the material costs, assembly costs, operation costs, and maintenance costs compared to other refrigeration corollary equipment because it does not require a cooling tower, cooling system pipeline, or cooling circulating water pump.

Easy operation The machine is controlled through an easy to use interface on its panel. The panel displays the running status, running data, and warning status. The controller allows for time control and it allows for automated operation.

High energy efficiency and low noise The machine features a high performance semi-hermetic dual screw type compressor with a condenser and refrigeration components supplied by trusted manufacturers. The optimal design and assembly is thanks to strict testing and quality control measures during production. The equipment features an automatic temperature control system for the automatic adjustment of load to minimize the use of electrical power during cooling and heating applications.

Attractive appearance and excellent corrosion resistance The shell is constructed from galvanized steel sheet. The external surface is coated with electrostatic plastic. This gives the cooling unit improved adaptability, particularly when installed outdoors. Main components
Screw type compressor 1. High-performance screw type compressor, 20% higher energy efficiency compared to normal compressor.
2. Four-segment (100%-75%-50%-25%), three-segment (100%-66%-33%) and non-segment control system.
3. Built-in oil pressure system can guarantee the best lubricating effect of the compressor without an oil pump. Double layer filter type oil separator and compressor are combined. External oil separator can be installed under special conditions.
4. R134a, R407c and other environmental friendly cold media can be adopted.
5. All-around compressor volume ratios with VI=2.2, 2.6, 3.0 and 3.5 are optional, which can effectively avoid energy waste by over-compression or under-compression. Volume control system is composed of a solenoid valve and slide valve, which can easily achieve partial load operation. Compressor has 25%-50%-75%-100% segmental adjust functions and non-segment functions to be fully compatible with building loads. Compared with piston compressors, the screw type compressor has fewer moving parts, only 1/3-1/4 of the piston compressor.

Finned condenser The air cooling finned condenser adopts an inner grooved copper tube with hydrophilic aluminum fins. The copper tube and fins are tightly bound together to achieve the best heat exchange effects.
Shell and tube type evaporator The pressure vessels are constructed form high-quality steel plate. Its manufacture and testing meets JB/T4750-2003 ‘Pressure Vessel for Refrigeration Equipment' standards. Exterior surface features flame-retardant water-proof heat-insulation and preservation materials. The evaporator baffle plate adopts PVC engineering plastic which has excellent corrosion resistance and good air impermeability to make the cooling water flow upwards and downwards along the baffle plate. This improves the heat exchange capacity of the evaporator.
Expansion valve The electronic expansion valve control system can reach a control accuracy up to 2600 steps. According to suction superheating and saturation pressure, combined with the electronic control system, we can precisely control the refrigerant flow, so as to ensure the unit is always in best running condition and the maximum capacity can be achieved. The adoption of highly efficient heat exchange tubes improves energy efficiency and effectiveness.

Distribution control box Distribution control cabinet. The distribution control cabinet is composed of compressor starting equipment, a power protector and a micro-computerized controller. The micro-computerized controller can run stably and safely under a temperature range of -15℃ to 65℃. It is equipped with a RS-232 and RS-485 standard communication interface. It can receive a remote signal for starting up and shutting down.

Safety equipment High and low voltage switch, anti-freezing temperature control, lube oil heater, high-pressure exhaust check valve, replaceable filter element dry filter, piezometer, emergency stop switch, overload protector, power protector, refrigerant injector.